1 /* Copyright (C) 1993-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
25 _hurd_fd_read (struct hurd_fd
*fd
, void *buf
, size_t *nbytes
, loff_t offset
)
29 mach_msg_type_number_t nread
;
31 error_t
readfd (io_t port
)
33 return __io_read (port
, &data
, &nread
, offset
, *nbytes
);
38 if (err
= HURD_FD_PORT_USE_CANCEL (fd
, _hurd_ctty_input (port
, ctty
, readfd
)))
43 if (nread
> *nbytes
) /* Sanity check for bogus server. */
45 __vm_deallocate (__mach_task_self (), (vm_address_t
) data
, nread
);
48 memcpy (buf
, data
, nread
);
49 __vm_deallocate (__mach_task_self (), (vm_address_t
) data
, nread
);